Question

Sudha  dipped  a  copper  coin  in  a  solution  of
silver  nitrate.After  some  time  she  saw  the
silver  shine  on  the  coin  .Why?Give  the
balanced  chemical  equation  for  the  same..


MSCERT Class 10 General Science Ch8 Understanding Metals and Non Metals

Answer 1

Cu is more reactive than Ag, therefore, displacement reaction occurs. When Cu is dipped in AgNO₃ it displaces Ag and a shinning deposit of Ag is formed on the coin. 

2AgNO3(aq) + Cu(s)  ===>> Cu(NO3)2(aq) + 2Ag(s)

Answer 2

Due to displacement reaction. As copper is more reactive than silver, copper displaces silver and forms copper nitrate such that a glowing and shining material (silver) deposits on copper coin.

Balanced equation:-  2AgNO3(aq) + Cu(s) → Cu(NO3)2(aq) + 2Ag(s)